In 1776, Adam Smith, legendary economist go figure, described a pin factory. One worker doing every step by themselves could barely make twenty pins a day. Ten workers, each doing one small step on their own, made about 48,000 pins a day.
I have never been to a pin factory. I just had a piece that was too fast for my brain to automatically put both hands on at one time.
“What an anecdote!” ~ Kyle Glenister
So I split the task. Right hand alone (lowkey sounds cooler) until I could play that part well. Then, only after right hand is perfect, left hand alone until they could both play together without me losing my mind.
That's the principle of specialization. Just give each worker one job and let them get really good at it. Each hand improved faster because it only had one thing to think about.
Then put them back together. Wow, I really thought it was that simple.
"It was not" ~ Kyle Glenister
The right hand, who had been training like an Olympic sprinter, wanted to go. The left hand, oh brother. One hand ran ahead, the other dragged behind, and the result sounded like two people who had learned the same song from two different videos.
This is the part of specialization nobody advertises in their fancy textbooks. Splitting up work makes each part more productive, but then the parts have to be coordinated. Quite a daunting task. In a factory, that's the manager, and all his employees. For me, it was just a simple metronome and a lot of slow practice with both hands together.
Specialization gave me two decent hands on their own. Coordination, the harder task, is what makes it one piano piece.
Smith's example had a whole team of workers. My hands only had me.
Which might explain the screaming.